Yep I'd take tank out for good cleanout & squiz at condition inside.
Also take sender unit out to change original sock filter on it.
Then can hit it with some black paint & then tick it off list.
Headers with some pipes aimed at ground work fine just like extractors...rite of passage to start an engine that way!
Years ago my cousin & I fired up a $100 v8 valiant wreck with no wheels sitting on bricks with glass jar as fuel tank...it fired up fine after rusty/blocked muffler blew itself apart